* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f5f7fa;
    padding: 20px;
}
.container {
    max-width: 400px;
    margin: 0 auto;
}
.card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    text-align: center;
}
.title {
    font-size: 24px;
    color: #222;
    margin-bottom: 30px;
    font-weight: bold;
}
.tip-box {
    background: linear-gradient(135deg, #ff6b6b, #ff4757);
    color: white;
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 30px;
}
.tip-text {
    font-size: 18px;
    font-weight: bold;
    line-height: 1.5;
}
.qrcode-box {
    margin: 0 auto 25px;
    width: 220px;
    height: 220px;
    padding: 10px;
    border: 3px solid #eee;
    border-radius: 16px;
    background: white;
}
.qrcode {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.desc {
    font-size: 15px;
    color: #666;
    line-height: 1.6;
}